CN101616516A - Line heat source - Google Patents
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- CN101616516A CN101616516A CN200910138340A CN200910138340A CN101616516A CN 101616516 A CN101616516 A CN 101616516A CN 200910138340 A CN200910138340 A CN 200910138340A CN 200910138340 A CN200910138340 A CN 200910138340A CN 101616516 A CN101616516 A CN 101616516A
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- carbon nano
- tube
- heat source
- line heat
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2214/00—Aspects relating to resistive heating, induction heating and heating using microwaves, covered by groups H05B3/00, H05B6/00
- H05B2214/04—Heating means manufactured by using nanotechnology
Abstract
The present invention relates to a kind of line heat source, comprise a wire supporting construction, a heating element is arranged at the surface of wire supporting construction, and two electrode gap settings, and be electrically connected with this heating element respectively, wherein, described heating element comprises a carbon nano tube structure.
Description
Technical field
The present invention relates to a kind of line heat source, relate in particular to a kind of line heat source based on carbon nano-tube.
Background technology
Thermal source plays an important role in people's production, life, scientific research.Line heat source is one of thermal source of using always, is widely used in fields such as electric heater, infrared therapeutic apparatus, electric heater.
See also Fig. 1, prior art provides a kind of line heat source 10, and it comprises a hollow cylindrical support 102; One heating element 104 is arranged at this support 102 surfaces, and an insulating protective layer 106 is arranged at this heating element 104 surfaces; Two electrodes 110 are arranged at support 102 two ends respectively, and are electrically connected with heating element 104; Two clamping elements 108 fix two electrodes 110 and heating element 104 at support 102 two ends respectively.Wherein, heating element 104 adopts a carbon fiber paper to form by the mode of twining or wrap up usually.When applying a voltage by 110 pairs of these line heat sources 10 of two electrodes, described heating element 104 produces Joule heat, and carries out thermal radiation towards periphery.Described carbon fiber paper comprises paper base material and is distributed in asphalt base carbon fiber in this paper base material in a jumble.Wherein, paper base material comprises the mixture of cellulose fiber peacekeeping resin etc., and the diameter of asphalt base carbon fiber is 3～6 millimeters, and length is 5～20 microns.
Yet, adopt carbon fiber paper to have following shortcoming as heating element: the first, carbon fiber paper thickness is bigger, is generally tens microns, makes line heat source be difficult for making microstructure, can't be applied to the heating of microdevice.The second, owing to comprised paper base material in this carbon fiber paper, so the density of this carbon fiber paper is bigger, weight is big, makes the line heat source that adopts this carbon fiber paper use inconvenience.The 3rd, because the asphalt base carbon fiber in this carbon fiber paper distributes in a jumble, so the intensity of this carbon fiber paper is less, flexibility is relatively poor, breaks easily, and having limited it should have scope.The 4th, the electric conversion efficiency of carbon fiber paper is lower, is unfavorable for energy-conserving and environment-protective.
Summary of the invention
In view of this, necessaryly provide a kind of line heat source, this line heat source weight is less, and intensity is big, can make microstructure, is applied to the heating of microdevice, and electric conversion efficiency is higher, is beneficial to energy-conserving and environment-protective.
A kind of line heat source comprises a wire supporting construction, and a heating element is arranged at the surface of wire supporting construction, and two electrode gap settings, and is electrically connected with this heating element respectively, and wherein, described heating element comprises a carbon nano tube structure.
Compared with prior art, described line heat source has the following advantages: the first, and carbon nano-tube can be made the carbon nano tube structure of arbitrary dimension easily, both can be applied to macroscopical field and also can be applied to microscopic fields.The second, carbon nano-tube has littler density than carbon fiber, so, adopt the line heat source of carbon nano tube structure to have lighter weight, easy to use.The 3rd, the electric conversion efficiency height of carbon nano tube structure, thermal resistivity is low, so this line heat source has the characteristics rapid, that thermo-lag is little, rate of heat exchange is fast that heat up.
Description of drawings
Fig. 1 is the structural representation of the line heat source of prior art.
Fig. 2 is the structural representation of the line heat source of the embodiment of the invention.
Fig. 3 is the generalized section of the line heat source III-III along the line of Fig. 2.
Fig. 4 is the generalized section of the line heat source IV-IV along the line of Fig. 3.
Fig. 5 is the stereoscan photograph of the carbon nano-tube membrane in the line heat source of the embodiment of the invention.
Fig. 6 is the structural representation of the carbon nano-tube fragment in the carbon nano-tube membrane among Fig. 5.
The stereoscan photograph that Fig. 7 is arranged of preferred orient along same direction for the carbon nano-tube in the carbon nano-tube laminate in the line heat source of the embodiment of the invention.
The stereoscan photograph that Fig. 8 is arranged of preferred orient along different directions for the carbon nano-tube in the carbon nano-tube laminate in the line heat source of the embodiment of the invention.
Fig. 9 is the stereoscan photograph of the carbon nano-tube waddingization film in the line heat source of the embodiment of the invention.
Figure 10 is the stereoscan photograph of the non-carbon nano tube line that reverses in the line heat source of the embodiment of the invention.
Figure 11 is the stereoscan photograph of the carbon nano tube line that reverses in the line heat source of the embodiment of the invention.
Embodiment
Describe line heat source provided by the invention in detail below with reference to accompanying drawing.
See also Fig. 2 to Fig. 4, the embodiment of the invention provides a kind of line heat source 20, and this line heat source 20 comprises a wire supporting construction 202; One reflector 210 is arranged at the surface of this wire supporting construction 202; One heating element 204 is arranged at 210 surfaces, described reflector; Two electrodes 206 are provided with at interval, and are electrically connected with this heating element 204; And one insulating protective layer 208 be arranged at the surface of this heating element 204.The length and the diameter of described line heat source 20 are not limit, and preferably, the diameter of described line heat source 20 is 0.1 micron～1.5 centimetres.The diameter of the line heat source 20 of present embodiment is 1.1 millimeters～1.1 centimetres.
Described wire supporting construction 202 is used to support heating element 204, and its material can be hard material or flexible material.Described hard material comprises one or more in pottery, glass, resin and the quartz etc.Described flexible material comprises one or more in plastics, resin and the flexible fiber etc.Described wire supporting construction 202 can adopt flexible material, and at this moment, described line heat source 20 is bent into arbitrary shape in use as required.The length of described wire supporting construction 202, diameter and shape are not limit, and can select according to actual needs.The wire supporting construction 202 of present embodiment is a ceramic bar, and its diameter is 1 millimeter～1 centimetre.
The material in described reflector 210 is a white insulating material, as: one or more in metal oxide, slaine and the pottery etc.In the present embodiment, the material in described reflector 210 is preferably alundum (Al, and its thickness is 100 microns～0.5 millimeter.This reflector 210 can be by the preparation of methods such as physical vaporous deposition or chemical vapour deposition technique.Described physical vaporous deposition comprises sputter or evaporation etc.In the present embodiment, the method deposition alundum (Al by sputter is in these wire supporting construction 202 surfaces.Described reflector 210 is used for reflecting the heat that described heating element 204 is sent out, and makes it effectively be dispersed into extraneous space and goes.Be appreciated that but this reflector 210 is a choice structure.
Described heating element 204 comprises a carbon nano tube structure.This carbon nano tube structure can wrap up or be wound in the surface in described reflector 210.This carbon nano tube structure can utilization itself viscosity be connected with this reflector 210, also can be connected with reflector 210 by binding agent.In the present embodiment, described binding agent is a silica gel.Be appreciated that when this line heat source 20 does not comprise reflector 210 heating element 204 can directly wrap up or be wound in the surface of described wire supporting construction 202.
Described carbon nano tube structure is a self supporting structure.So-called " self supporting structure " i.e. this carbon nano tube structure need not by a support body supports, also can keep self specific shape.The carbon nano tube structure of this self supporting structure comprises a plurality of carbon nano-tube, and these a plurality of carbon nano-tube attract each other by Van der Waals force, thereby makes carbon nano tube structure have specific shape.Carbon nano-tube in the described carbon nano tube structure comprises one or more in Single Walled Carbon Nanotube, double-walled carbon nano-tube and the multi-walled carbon nano-tubes.The diameter of described Single Walled Carbon Nanotube is 0.5 nanometer～50 nanometers, and the diameter of described double-walled carbon nano-tube is 1.0 nanometers～50 nanometers, and the diameter of described multi-walled carbon nano-tubes is 1.5 nanometers～50 nanometers.The length of described carbon nano-tube is not limit, and preferably, the length of carbon nano-tube is greater than 100 microns.This carbon nano tube structure can be planar or linear structure.Because this carbon nano tube structure has self-supporting, so this carbon nano tube structure still can keep planar or linear structure not by support body supports the time.The unit are thermal capacitance of described carbon nano tube structure is less than 2 * 10
-4Every square centimeter of Kelvin of joule.Preferably, the unit are thermal capacitance of described carbon nano tube structure is smaller or equal to 1.7 * 10
-6Every square centimeter of Kelvin of joule.Because the carbon nano-tube in this carbon nano tube structure has good flexible, makes this carbon nano tube structure have good flexible, can bending fold become arbitrary shape and do not break.
Described carbon nano tube structure comprises at least one carbon nano-tube film, at least one liner structure of carbon nano tube or its combination.Particularly, described carbon nano-tube film can be carbon nano-tube membrane, carbon nano-tube waddingization film or carbon nano-tube laminate.Described liner structure of carbon nano tube can comprise the twisted wire structure that is arranged in parallel at least one carbon nano tube line, a plurality of carbon nano tube line the fascicular texture formed or a plurality of carbon nano tube line reverse composition mutually.When carbon nano tube structure comprised carbon nano-tube film, described carbon nano-tube film wrapped up or is wound in the surface of wire supporting construction 202.When carbon nano tube structure only comprised a liner structure of carbon nano tube, this liner structure of carbon nano tube was wound in described wire supporting construction 202 surfaces.When carbon nano tube structure comprised a plurality of liner structure of carbon nano tube, a plurality of liner structure of carbon nano tube can be arranged in parallel, and arranged in a crossed manner or braiding is provided with and forms a stratiform structure, is wrapped in described wire supporting construction 202 surfaces then.When carbon nano tube structure comprised carbon nano-tube film and liner structure of carbon nano tube simultaneously, described liner structure of carbon nano tube can be arranged at least one surface of at least one carbon nano-tube film.
Described carbon nano-tube film comprises equally distributed carbon nano-tube, combines closely by Van der Waals force between the carbon nano-tube.Carbon nano-tube in this carbon nano-tube film is unordered or orderly arrangement.The arrangement of the unordered finger carbon nano-tube here is random, and the orientation of the most at least carbon nano-tube of orderly finger here has certain rule.Particularly, when carbon nano-tube film comprised the carbon nano-tube of lack of alignment, carbon nano-tube was twined mutually or isotropism is arranged; When carbon nano tube structure comprised orderly carbon nanotubes arranged, carbon nano-tube was arranged of preferred orient along a direction or a plurality of direction.
The length of described carbon nano tube structure, width and thickness are not limit, and can prepare according to actual needs.The length of carbon nano tube structure provided by the invention is 1～10 centimetre, and width is 1～10 centimetre, and thickness is 0.5 nanometer～2 millimeter.Preferably, described carbon nano tube structure comprises the carbon nano-tube film of a plurality of overlapping settings, and the thickness of this carbon nano tube structure is preferably 0.01 micron～1 millimeter.The thermal response speed that is appreciated that carbon nano tube structure is relevant with its thickness.Under situation of the same area, the thickness of carbon nano tube structure is big more, and thermal response speed is slow more; Otherwise the thickness of carbon nano tube structure is more little, and thermal response speed is fast more.When the thickness of described carbon nano tube structure is 1 micron～1 millimeter, carbon nano tube structure just can reach maximum temperature in less than 1 second time.So this line heat source 20 is applicable to the object Fast Heating.In the present embodiment, described heating element 204 employing thickness are 100 microns carbon nano tube structure.The length of this carbon nano tube structure is 5 centimetres, and the width of carbon nano tube structure is 3 centimetres.Utilize the viscosity of carbon nano tube structure itself, this carbon nano tube structure is wrapped in the surface in described reflector 210.
Described carbon nano-tube membrane is for directly pulling a kind of carbon nano-tube film with self-supporting of acquisition from carbon nano pipe array.Each carbon nano-tube membrane comprises a plurality of along same direction preferred orientation and be parallel to carbon nano-tube membrane surface carbon nanotubes arranged.Described carbon nano-tube joins end to end by Van der Waals force.See also Fig. 5 and Fig. 6, particularly, each carbon nano-tube membrane comprise a plurality of continuously and the carbon nano-tube fragment 143 that aligns.This a plurality of carbon nano-tube fragment 143 joins end to end by Van der Waals force.Each carbon nano-tube fragment 143 comprises a plurality of carbon nano-tube that are parallel to each other 145, and this a plurality of carbon nano-tube that is parallel to each other 145 is combined closely by Van der Waals force.This carbon nano-tube fragment 143 has width, thickness, uniformity and shape arbitrarily.The thickness of described carbon nano-tube membrane is 0.5 nanometer～100 micron, and width is relevant with the size of the carbon nano pipe array that pulls this carbon nano-tube membrane, and length is not limit.Described carbon nano-tube membrane and preparation method thereof specifically saw also people such as Fan Shoushan in application on February 9th, 2007, in disclosed CN101239712A number Chinese publication application on August 13 " carbon nano-tube membrane structure and preparation method thereof " in 2008.For saving space, only be incorporated in this, but all technology of above-mentioned application disclose the part that also should be considered as the exposure of the present patent application technology.When this carbon nano tube structure is made up of the carbon nano-tube membrane, and the thickness of carbon nano tube structure is when smaller, and for example less than 10 microns, this carbon nano tube structure has good transparency, and its light transmittance can reach 96%, can be used to make a transparent thermal source.
When described carbon nano tube structure comprises the multilayer carbon nanotube membrane of stacked setting, form an intersecting angle α between the carbon nano-tube that is arranged of preferred orient in the adjacent two layers carbon nano-tube membrane, and α spends (0 °≤α≤90 °) more than or equal to 0 degree smaller or equal to 90.Have certain interval between described a plurality of carbon nano-tube membrane or between the adjacent carbon nano-tube among carbon nano-tube membrane, thereby form a plurality of micropores in carbon nano tube structure, the aperture of micropore is approximately less than 10 microns.
The carbon nano tube structure of the embodiment of the invention can comprise a plurality of carbon nano-tube membranes along the stacked setting of equidirectional, thereby the carbon nano-tube in the carbon nano tube structure all is arranged of preferred orient along same direction.
Described carbon nano-tube laminate comprises equally distributed carbon nano-tube, and carbon nano-tube is arranged of preferred orient along same direction or different directions.Carbon nano-tube in the described carbon nano-tube laminate mutually part overlaps, and attracts each other by Van der Waals force, combines closely, and makes this carbon nano tube structure have good flexible, can bending fold becomes arbitrary shape and does not break.And owing to attract each other by Van der Waals force between the carbon nano-tube in the carbon nano-tube laminate, combine closely, making the carbon nano-tube laminate is the structure of a self-supporting.Described carbon nano-tube laminate can obtain by rolling a carbon nano pipe array.Carbon nano-tube in the described carbon nano-tube laminate forms an angle β with the surface of the growth substrate that forms carbon nano pipe array, wherein, β is more than or equal to 0 degree and smaller or equal to 15 degree (0≤β≤15 °), this angle β is with to be applied to the pressure that carbon nano-pipe array lists relevant, pressure is big more, this angle is more little, and preferably, the carbon nano-tube in this carbon nano-tube laminate is parallel to this growth substrate and arranges.This carbon nano-tube laminate is to obtain by rolling a carbon nano pipe array, and according to the mode difference that rolls, the carbon nano-tube in this carbon nano-tube laminate has different spread patterns.Particularly, see also Fig. 7, when when same direction rolls, carbon nano-tube is arranged of preferred orient along a fixed-direction; See also Fig. 8, when when different directions rolls, carbon nano-tube is arranged of preferred orient along different directions; When rolling along direction perpendicular to carbon nano pipe array, the carbon nano-tube film isotropism.The length of carbon nano-tube is greater than 50 microns in this carbon nano-tube laminate.Described carbon nano-tube laminate and preparation method thereof specifically saw also people such as Fan Shoushan in application on June 1st, 2007, in disclosed CN101314464A Chinese patent application on December 3 " preparation method of carbon nano-tube film " in 2008.For saving space, only be incorporated in this, but all technology of above-mentioned application disclose the part that also should be considered as the exposure of the present patent application technology.
The area and the thickness of this carbon nano-tube laminate are not limit, and can select according to actual needs.The area of this carbon nano-tube laminate and the size of carbon nano pipe array are basic identical.The height of this carbon nano-tube laminate thickness and carbon nano pipe array and the pressure that rolls are relevant, can be 1 micron～1 millimeter.The height that is appreciated that carbon nano pipe array is big more and applied pressure is more little, and then the thickness of Zhi Bei carbon nano-tube laminate is big more; Otherwise the height of carbon nano pipe array is more little and applied pressure is big more, and then the thickness of Zhi Bei carbon nano-tube laminate is more little.Have certain interval between the adjacent carbon nano-tube among the described carbon nano-tube laminate, thereby form a plurality of micropores in the carbon nano-tube laminate, the aperture of micropore is approximately less than 10 microns.
Described carbon nano tube structure can comprise at least one carbon nano-tube waddingization film, and this carbon nano-tube waddingization film comprises mutual winding and equally distributed carbon nano-tube.The length of carbon nano-tube is greater than 10 microns, and preferably, the length of carbon nano-tube is more than or equal to 200 microns and smaller or equal to 900 microns.Attract each other, twine by Van der Waals force between the described carbon nano-tube, form network-like structure.Carbon nano-tube in the described carbon nano-tube waddingization film is evenly to distribute, and random arrangement makes this carbon nano-tube waddingization film isotropism.Carbon nano-tube in the described carbon nano-tube waddingization film forms a large amount of microcellular structures, and micropore size is approximately less than 10 microns.The length and the width of described carbon nano-tube waddingization film are not limit.See also Fig. 9, because in carbon nano-tube waddingization film, carbon nano-tube is twined mutually, so this carbon nano-tube waddingization film has good flexible, and is a self supporting structure, can bending fold becomes arbitrary shape and does not break.The area and the thickness of described carbon nano-tube waddingization film are not all limit, and thickness is 1 micron～1 millimeter, are preferably 100 microns.Described carbon nano-tube waddingization film and preparation method thereof specifically saw also people such as Fan Shoushan in application on April 13rd, 2007, in disclosed CN101284662A Chinese patent application on October 15 " preparation method of carbon nano-tube film " in 2008.For saving space, only be incorporated in this, but all technology of above-mentioned application disclose the part that also should be considered as the exposure of the present patent application technology.
Described carbon nano tube line comprises a plurality of along carbon nano tube line axial orientation carbon nanotubes arranged.Described carbon nano tube line can be non-carbon nano tube line that reverses or the carbon nano tube line that reverses.This non-carbon nano tube line that reverses obtains for the carbon nano-tube membrane is handled by organic solvent.See also Figure 10, this non-carbon nano tube line that reverses comprises a plurality of along carbon nano tube line length direction carbon nanotubes arranged.This carbon nano tube line that reverses reverses acquisition for adopting a mechanical force in opposite direction with described carbon nano-tube membrane two ends.See also Figure 11, this carbon nano tube line that reverses comprises a plurality of around carbon nano tube line axial screw carbon nanotubes arranged.This non-carbon nano tube line that reverses and the carbon nano-tube line length of reversing are not limit, and diameter is 0.5 nanometer～100 micron.Described carbon nano tube line and preparation method thereof specifically sees also people such as Fan Shoushan in application on September 16th, 2002, CN100411979C number China's bulletin patent " a kind of carbon nano-tube rope and manufacture method thereof " in bulletin on August 20th, 2008, and on December 16th, 2005 application, in disclosed CN1982209A number Chinese publication application " carbon nano-tube filament and preparation method thereof " on June 20 in 2007.For saving space, only be incorporated in this, but all technology of above-mentioned application disclose the part that also should be considered as the exposure of the present patent application technology.
Further, can adopt a volatile organic solvent to handle the carbon nano tube line that this reverses.Under the capillary effect that when volatile organic solvent volatilizees, produces, adjacent carbon nano-tube is combined closely by Van der Waals force in the carbon nano tube line that reverses after the processing, the diameter and the specific area of the carbon nano tube line that reverses are reduced, and density and intensity increase.
Because this carbon nano tube line obtains for adopting organic solvent or mechanical force to handle above-mentioned carbon nano-tube membrane, this carbon nano-tube membrane is a self supporting structure, so this carbon nano tube line is a self supporting structure.In addition, have the gap between the adjacent carbons nanotube in this carbon nano tube line, so this carbon nano tube line has a large amount of micropores, and the aperture of micropore is approximately less than 10 microns.
The set-up mode of described two electrodes 206 is not limit, and only need guarantee that it is provided with at interval, and is electrically connected with this heating element 204 and gets final product.Particularly, described electrode 206 can be arranged on the same surface of described heating element 204 and also can be arranged on the different surfaces of described heating element 204.Described electrode 206 can be arranged on the surface of this heating element 204 by the viscosity or the conductive adhesive (figure does not show) of carbon nano tube structure.Conductive adhesive also can be fixed in electrode 206 on the surface of carbon nano tube structure when realizing that electrode 206 and carbon nano tube structure electrically contact better.Can apply voltage to heating element 204 by these two electrodes 206.Wherein, be provided with at interval between two electrodes 206, avoid short circuit phenomenon to produce so that insert certain resistance when adopting heating element 204 heating powers of carbon nano tube structure.Preferably, because wire supporting construction 202 diameters are less, two electrode 206 space sets are in the two ends of wire supporting construction 202, and around the surface that is arranged at heating element 204.
Described electrode 206 is conductive film, sheet metal or metal lead wire.The material of this conductive film can be metal, alloy, indium tin oxide (ITO), antimony tin oxide (ATO), conductive silver glue, conducting polymer etc.This conductive film can be formed at heating element 204 surfaces by physical vaporous deposition, chemical vapour deposition technique or other method.The material of this sheet metal or metal lead wire can be copper sheet or aluminium flake etc.This sheet metal can be fixed in heating element 204 surfaces by conductive adhesive.
Described electrode 206 can also be a carbon nano tube structure.This carbon nano tube structure wraps up or is wound in the surface in reflector 210.This carbon nano tube structure can be by viscosity or the conductive adhesive surface of being fixed in reflector 210 of himself.This carbon nano tube structure comprises and aligning and equally distributed a plurality of metallic carbon nanotubes.Particularly, this carbon nano tube structure comprises at least one carbon nano-tube membrane, at least one liner structure of carbon nano tube or its combination.
In the present embodiment, with two carbon nano-tube membranes be arranged at respectively wire supporting construction 202 along the two ends of its length direction as electrode 206.These two carbon nano-tube membranes are surrounded on the inner surface of heating element 204, and electrically contact by forming between conductive adhesive and the heating element 204.Described conductive adhesive is preferably elargol.Because the heating element 204 in the present embodiment also adopts carbon nano tube structure, so have less ohmic contact resistance between electrode 206 and the heating element 204, can improve the utilance of 20 pairs of electric energy of line heat source.
The material of described insulating protective layer 208 is an insulating material, as: rubber, resin etc.Described insulating protective layer 208 thickness are not limit, and can select according to actual conditions.In the present embodiment, the material of this insulating protective layer 208 adopts rubber, and its thickness is 0.5～2 millimeter.This insulating protective layer 208 can be formed at the surface of heating element 204 by methods such as coating or parcels.Described insulating protective layer 208 is used for preventing that this line heat source 20 from electrically contacting with external world's formation in use, can also prevent the carbon nano tube structure absorption introduced contaminants in the heating element 204 simultaneously.But this insulating protective layer 208 is a choice structure.
In the present embodiment, it is on 1 centimetre the wire supporting construction 202 that this carbon nano tube structure is wrapped in a diameter, and its length between two electrodes 206 is 3 centimetres.Electric current flows into along the length direction of wire supporting construction 202.Measuring instrument is respectively infrared radiation thermometer RAYTEK RAYNERIP-M and infrared radiation thermometer AZ-8859.When applying voltage at 1 volt～20 volts, heating power is 1 watt～40 watt-hours, and the surface temperature of carbon nano tube structure is 50 ℃～500 ℃.This shows that this carbon nano tube structure has higher electric conversion efficiency.For object with black matrix structure, when being 200 ℃～450 ℃, its pairing temperature just can send thermal radiation invisible to the human eye (infrared ray), and the thermal radiation of this moment is the most stable, most effective, the radiations heat energy maximum that is produced.
This line heat source 20 can be arranged at it body surface that will heat or itself and heated object are provided with at interval in use, utilizes its thermal radiation to heat.In addition, a plurality of line heat sources 20 can also be arranged in various predetermined figures uses.This line heat source 20 can be widely used in fields such as electric heater, infrared therapeutic apparatus, electric heater.
In the present embodiment,, make the carbon nano tube structure of preparation can have less thickness because carbon nano-tube has nano level diameter, so, adopt the wire supporting construction of minor diameter can prepare the micro wire thermal source.Carbon nano-tube has stronger corrosion resistance, and it can be worked in sour environment.And carbon nano-tube has extremely strong stability, also can not decompose even work under the vacuum environment of high temperature more than 3000 ℃, makes this line heat source 20 be suitable for work under the vacuum high-temperature.In addition, the strength ratio of carbon nano-tube is high 100 times with the intensity of the steel of volume, weight but have only its 1/6, so, adopt the line heat source 20 of carbon nano-tube to have higher intensity and lighter weight.
In addition, those skilled in the art also can do other variations in spirit of the present invention, and certainly, the variation that these are done according to spirit of the present invention all should be included within the present invention's scope required for protection.
Claims (13)
1. line heat source, it comprises:
One wire supporting construction;
One heating element is arranged at the surface of wire supporting construction, and;
Two electrode gap settings, and be electrically connected with this heating element respectively;
It is characterized in that described heating element comprises a carbon nano tube structure.
2. line heat source as claimed in claim 1 is characterized in that, described carbon nano tube structure comprises a plurality of equally distributed carbon nano-tube.
3. line heat source as claimed in claim 2 is characterized in that, described carbon nano-tube is arranged or lack of alignment in this carbon nano tube structure in order.
4. line heat source as claimed in claim 3 is characterized in that, the length of described carbon nano-tube is greater than 100 microns, and diameter is less than 50 nanometers.
5. line heat source as claimed in claim 1 is characterized in that, the unit are thermal capacitance of described carbon nano tube structure is less than 2 * 10
-4Every square centimeter of Kelvin of joule.
6. line heat source as claimed in claim 5 is characterized in that, the unit are thermal capacitance of described carbon nano tube structure is smaller or equal to 1.7 * 10
-6Every square centimeter of Kelvin of joule.
7. line heat source as claimed in claim 1 is characterized in that, described carbon nano tube structure twines or be wrapped in the surface of wire supporting construction.
8. line heat source as claimed in claim 7 is characterized in that, described carbon nano tube structure is by himself viscosity or the conductive adhesive surface of being fixed in the wire supporting construction.
9. line heat source as claimed in claim 1 is characterized in that, described two electrode gap are arranged at the surface of heating element, and are positioned at the two ends of wire supporting construction.
10. line heat source as claimed in claim 1 is characterized in that, described electrode is a conductive film, sheet metal or metal lead wire.
11. line heat source as claimed in claim 1, it is characterized in that, the material of described wire supporting construction is flexible material or hard material, and described flexible material comprises in plastics and the flexible fiber one or more, and described hard material comprises one or more in pottery, glass, resin and the quartz.
12. line heat source as claimed in claim 1 is characterized in that, described line heat source comprises that further a reflector is arranged between heating element and the wire supporting construction, and the material in described reflector comprises one or more in metal oxide, slaine and the pottery.
13. line heat source as claimed in claim 1 is characterized in that, described line heat source comprises that further an insulating protective layer is arranged at the outer surface of described heating element.
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|---|---|---|---|
| CN 200910138340 CN101616516B (en) | 2008-06-27 | 2009-04-24 | Line heat source |
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| CN200810068077.7 | 2008-06-27 | ||
| CN200810068077 | 2008-06-27 | ||
| CN 200910138340 CN101616516B (en) | 2008-06-27 | 2009-04-24 | Line heat source |
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| CN101616516A true CN101616516A (en) | 2009-12-30 |
| CN101616516B CN101616516B (en) | 2013-04-24 |
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| CN (1) | CN101616516B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106162954A (en) * | 2016-06-21 | 2016-11-23 | 江西理工大学 | A kind of Nanotubes and preparation method thereof with it as the application of low-temperature heating body |
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| CN101616516B (en) | 2013-04-24 |
| JP2010010133A (en) | 2010-01-14 |
| JP4791566B2 (en) | 2011-10-12 |
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